1321211105 has 16 divisors (see below), whose sum is σ = 1594080000. Its totient is φ = 1051236480.

The previous prime is 1321211093. The next prime is 1321211107. The reversal of 1321211105 is 5011121231.

It is a de Polignac number, because none of the positive numbers 2^k-1321211105 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321211107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880646 + ... + 882144.

It is an arithmetic number, because the mean of its divisors is an integer number (99630000).

Almost surely, 2^1321211105 is an apocalyptic number.

It is an amenable number.

1321211105 is a deficient number, since it is larger than the sum of its proper divisors (272868895).

1321211105 is a wasteful number, since it uses less digits than its factorization.

1321211105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1321211105 is about 36348.4677118582. The cubic root of 1321211105 is about 1097.2966966539.

Adding to 1321211105 its reverse (5011121231), we get a palindrome (6332332336).

The spelling of 1321211105 in words is "one billion, three hundred twenty-one million, two hundred eleven thousand, one hundred five".